US3544457A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for fluid treatment
Assignee: North Carolina National Bank NCNB
•
Filing: 1968-03-28
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Granted: 1970-12-01
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Expires: 1988-03-28
Abstract
No abstract record available.
Inventors
- 👤 Fredrick T Tulley
- 👤 Berlin C Harris Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 01:44
CPC Classifications
B; B01; B01D; B01D39/00; B01D39/02; B01D39/04; B01D24/00; B01D24/007
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2101961A
Cited
US2057237A
Cited
US3293174A
Cited
US3298521A
Cited
US3327859A
Cited
US3382983A
Cited
US3352778A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-30 | 1974-06-01 | 1974-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-30 | 1978-06-01 | 1978-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-30 | 1982-06-01 | 1982-12-01 | $7700.00 | Window Closed / Lapsed |